Frederick w



(No Model.)

F. W. IRELAND.

BIT BRAGE.

No. M1513.

fly, z,

Patented Aug. 30, 1881.

UNITED STATES PATENT kOEEICE.

FREDERICK W. IRELAND,- OF BUFFALO, NEV YORK.

BIT-BRAC E.

SPECIFICATION forming part of Letters Patent No. 246,513, dated August30, 1881.

Application filed April 11, 1881.

To all whom it may concern Be it known that I, FREDERICK W. IRE- LAND,of the city of Buffalo, in the county ot' Erie and State of New York,have invented new and useful Improvements in Bit-Braces, ot' which thefollowing is a speciticatiomreference being had to the accompanyingdrawings.

This invention relates to that class ot' bitbraces in which the socketis provided with two sliding jaws, between which the bit is clamped.

The object of my invention is to produce a simple. and durable brace ofthis character in which the clamping-jaws can be quicklyopened andclosed; and my invention consists of the particular construction ot' theparts wherebyT the bit is held in the socket, and whereby theclamping-jaws are opened and closed, as hereinafter fully set forth.

In the accompanying drawings, Figure l is a sectional elevation of myimproved bit-brace, showing the clamping-jaws closed. Fig. 2 is asimilar view, showing the clamping-jaws open. Fig. 3 is a fragmentaryelevation at right angles to Fig. l. Fig. 4 is a horizontal section in.line fr w, Fig. l. Fig. 5 is an end View of the brace. Fig. 6 is asect-ion in liney y, Fig. 1. Fig. 7 is an elevation of one of theclamping-jaws at right angles to Fig. 1.

Like letters of reference refer to similar parts in the several gures.

A represents the end of the bent bar ofthe brace, which may be ot anyordinaryT and wellknown construction.

B represents the socket portion, which is secured to the end A of thebrace-bar in a wellknown manner.

brepresentsatapering square openingformed in the inner contracted part,B, ofthe socket portion B, for the reception of the square tang O of thebrace.

D D are the clamping-jaws, which are arranged in inwardly-diverging waysor grooves d in the outer enlarged part, B2, of the socket portion B.The'ways d are preferably made of dovetail form in cross-section, toconfine the jaws D against movement except in thelongitudinal directionof the ways. The clampingj'aws D are arranged on opposite sides of thebit, and their heads or outer enlarged ends are formed to irmly graspthe shank of the bit.

E represents a sleeve which surrounds the (No model.)

socket portion B. The outer' enlarged part of the sleeve slides on theenlarged part B2 ofthe socket portion, and is provided with two inwardly-projecting pins, e, which engage in openings f in the lower ends ot'the jaws D, which latter project below the bottom ot' the enlarged outerpart, B2, of the socket portion. By raising or lowering the sleeve E thejaws are correspondingly raised or lowered in their inclined ways, andthe heads of thejaWs caused to approach each other or to recede fromeach other. The pins c are preferably cast with the sleeve E, andtheopenings f in the jaws are made in the form of open slots, so that thepins can be engaged in these openings by turning either the sleeve orthe socket on its aXis.

g is a spiral spring which surrounds the inner contracted part, B', ofthe socket portion, and which rests with its inner end upon projectinglips or shoulders h, formed on the part B', and bears with its outer endagainst the pins @and lugs e', formed in the sleeve E. The spring gtends, therefore, to retain the sleeve E in its outermost position, andthe jaws D, which follow the movements ofthe sleeve, are thereby held ina closed position. The inner contracted portion ot' the sleeve Esurrounds the spring g, and has its inner end turned inward against theinner contracted part, B', of the socket portion below the projectinglips h. The sleeve E is prevented from turning on the socket portion bya pin or screw, i, which is secured to the sleeve E, and projects into alongitudinal groove or recess, j, formed in the surface of @the innercontracted part, B', of the socket portion.

The parts are readily put together by first inserting the spring g intothe cavity of the sleeve E, which is readily accomplished by screwingthe spring Vdown over the inwardlyprojecting pins e, then inserting thesocket portion into the sleeve by screwing the socket portion down intothe spring, the outwardly-projecting lips 7L engaging between thethreads of the spring, then engaging the slots f of the clampingjawswith the pins e of the sleeve E, and finally securing the latter againstrotary movement by inserting'the pin t'. Vhen the parts are so puttogether the jaws D will be readily opened by depressing the sleeve E,as shown in Fig. 2, whereby the spring g is compressed. Upon releasingthe sleeve E the re- IOO action of the spring g will return the sleeveto its former position and close the jaws D.

Instead of casting the pins e on the sleeve E, they may be securedthereto by screw-threads or otherwise, when the openingsfin the jaws Dneed not be slotted, and the rotatory movenient of the sleeve will beprevented by the engagement ot' the pins c in the openings f of thejawswithout the aid of the pin i.

I claim as my invention- 1. The combination, with a socket portion, B,provided with a tang-seat, b, and inwardlydiverging ways d, whichpenetrate the enlarged head ofthe socket portion B, of slidingjaws D,

arranged in said ways, and confined thereby both on their inner andouter sides, and a sliding sleeve, E, surrounding the socket portion andconnected with the inner ends of thejaws, which latter are closed andopened by theinovements of the sleeve, substantially as set forth.

2. The combination, with the socket portion B, provided with atang-seat, b, andinwardlydiverging ways d, penetrating the head of thesocket portion B, ot' sliding jaws D, arranged in said ways, a slidingsleeve, E, surrounding the socket portion and connected with the innerends of thejaws, and a spring, g, tending to retain the sleeve and thejaws connected therewith in a closed position, substantially as setforth.

3. The combination, with the socket portion B, provided withinwardly-diverging ways d and slidingjaws D, arranged in said ways, andconstructed with openingsfattheirinner ends, ofthe sliding` sleeve E,provided with pins e, pro jecting into the openings j' of thejaws,projecting lips h, formed on the socket portion B, and a spring, g,interposed between the lips h and the pins e, substantially as setforth.

L1. The combination, with the socket portion B, provided within'.vardlydiverging ways d and sliding jaws D, arranged in said ways,and constructed with openingsfat theirinner ends, of the sliding sleeveE, provided with pins e, projecting into the openings f ot' the jaws,projecting lips h, formed on the socket portion B, a spring, y,interposed between the lips h andthe pins e, and a pin, secured to thesleeve E and projecting into a longitudinal groovc,j, formed in thesocket portion B, substantially as set forth.

` FREDERIC K W. IRE LAND.

Vitnesses:

JNO. J. BONNER, EDW. J. BRADY.

